Matthew
5 months ago
parent
25e465df3b
commit
680b763ff6
@ -0,0 +1,191 @@
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package com.xypower.mpapp;
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import androidx.annotation.NonNull;
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import androidx.appcompat.app.AppCompatActivity;
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import android.os.Bundle;
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import android.os.FileObserver;
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import android.os.Handler;
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import android.os.Looper;
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import android.os.Message;
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import android.os.Messenger;
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import android.text.method.ScrollingMovementMethod;
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import android.util.Log;
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import android.view.MenuItem;
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import com.xypower.common.MicroPhotoContext;
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import com.xypower.mpapp.databinding.ActivityLogBinding;
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import com.xypower.mpapp.utils.RandomReader;
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import java.io.File;
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public class LogActivity extends AppCompatActivity {
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public static final String TAG = "MPLOG";
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public static final int MSG_WHAT_LOG_OBSERVER = MicroPhotoService.MSG_WHAT_MAX + 10;
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public static final int MAX_LOG_LINES = 480;
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public static final int MIN_LOG_LINES = 120;
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private ActivityLogBinding binding;
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private Handler mHandler = null;
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private LogFileObserver mLogFileObserver = null;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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binding = ActivityLogBinding.inflate(getLayoutInflater());
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setContentView(binding.getRoot());
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getSupportActionBar().setDisplayHomeAsUpEnabled(true);
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binding.logs.setText("");
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binding.logs.setMovementMethod(ScrollingMovementMethod.getInstance());
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binding.logs.setScrollbarFadingEnabled(false);
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mHandler = new Handler(Looper.myLooper()) {
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@Override
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public void handleMessage(@NonNull Message msg) {
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switch (msg.what) {
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case MSG_WHAT_LOG_OBSERVER:
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{
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byte[] bytes = (byte[])msg.obj;
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int bytesRead = msg.arg1;
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String log = null;
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try {
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log = new String(bytes, 0, bytesRead, "UTF-8");
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} catch (Exception e) {
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e.printStackTrace();
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}
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if (log != null) {
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binding.logs.append(log);
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int offset = binding.logs.getLineCount() * binding.logs.getLineHeight();
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if (offset > binding.logs.getHeight()) {
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binding.logs.scrollTo(0, offset - binding.logs.getHeight() + binding.logs.getLineHeight());
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}
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}
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}
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break;
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}
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}
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};
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}
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@Override
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protected void onResume() {
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// call the superclass method first
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super.onResume();
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try {
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String logFilePath = MicroPhotoContext.buildAppDir(this.getApplicationContext());
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logFilePath += "logs";
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File file = new File(logFilePath);
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if (!file.exists()) {
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file.mkdirs();
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}
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logFilePath += "/log.txt";
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file = new File(logFilePath);
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if (!file.exists()) {
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file.createNewFile();
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}
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mLogFileObserver = new LogFileObserver(logFilePath);
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mLogFileObserver.startWatching();
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Log.i(TAG, "Log Observer Started");
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int lines = binding.logs.getLineCount();
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if (lines > MAX_LOG_LINES) {
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int excessLineNumber = lines - MIN_LOG_LINES;
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int eolIndex = -1;
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CharSequence charSequence = binding.logs.getText();
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for (int i = 0; i < excessLineNumber; i++) {
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do {
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eolIndex++;
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} while (eolIndex < charSequence.length() && charSequence.charAt(eolIndex) != '\n');
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}
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if (eolIndex < charSequence.length()) {
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binding.logs.getEditableText().delete(0, eolIndex + 1);
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}
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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@Override
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protected void onPause() {
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// call the superclass method first
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super.onPause();
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try {
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if (mLogFileObserver != null) {
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mLogFileObserver.stopWatching();
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mLogFileObserver = null;
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Log.i(TAG, "Log Observer Stopped");
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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@Override
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public boolean onOptionsItemSelected(MenuItem item) {
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switch (item.getItemId()) {
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case android.R.id.home:
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// todo: goto back activity from here
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finish();
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return true;
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default:
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return super.onOptionsItemSelected(item);
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}
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}
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private class LogFileObserver extends FileObserver {
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private long mOffset = 0;
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private String mPath = null;
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public LogFileObserver(String path) {
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super(path, FileObserver.MODIFY | FileObserver.CREATE);
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mPath = path;
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File file = new File(path);
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if (file.exists()) {
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mOffset = file.length();
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}
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}
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@Override
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public void onEvent(int event, String s) {
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int e = event & FileObserver.ALL_EVENTS;
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if (e == FileObserver.MODIFY) {
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File file = new File(mPath);
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long newOffset = file.length();
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if (newOffset > mOffset) {
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RandomReader reader = new RandomReader(mPath, mOffset);
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byte[] bytes = new byte[(int)(newOffset - mOffset)];
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int bytesRead = reader.read(bytes);
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mOffset += bytesRead;
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Message msg = Message.obtain();
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msg.what = MSG_WHAT_LOG_OBSERVER;
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msg.obj = bytes;
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msg.arg1 = bytesRead;
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mHandler.sendMessage(msg);
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}
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} else if (e == FileObserver.CREATE) {
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mOffset = 0;
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}
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}
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}
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}
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@ -0,0 +1,27 @@
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<?xml version="1.0" encoding="utf-8"?>
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<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:orientation="horizontal"
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tools:context=".LogActivity">
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<TextView
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android:id="@+id/logs"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:layout_margin="4dp"
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android:padding="4dp"
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android:background="@drawable/textview_border"
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android:orientation="horizontal"
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android:lineSpacingMultiplier="1.25"
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android:scrollbars="vertical"
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android:singleLine="false"
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android:text="Logs"
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android:textColor="@color/black"
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android:textIsSelectable="true"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintTop_toTopOf="parent" />
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</androidx.constraintlayout.widget.ConstraintLayout>
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